The check engine light came on. It is a '97 Cl600 with about 70K. I've gotten not to trust any code indications since everyone seems to be different for the same problem. My old shop has closed their doors and I am with a new (old) shop now. They got a reading of P0173-134 I don't understand the "134" after the 173. I have the code list and it is not on there. Or is it saying there are TWO codes, 173 and 134? Any ideas? And the car runs like the dream it has always been!